Extension table



Sept. 18, 1934. w. A. DUNCAN EXTENSION TABLE Filed June l2, 1953 gmc/Mofo mllamHndrewBu/ncang' wwwvw xm. Q Wm HQZWMM #L w -HHH m Patented sept. 1s, 1934 Y 1,973,894

Unirse lsr.trifft-s. PATENT @ori-TICE 1` Y EXTENSION TABLE Y William Andrew Duncan, .Statesvilla N. C. Application June 12,-19saserie1No. 675,497

` 5 claims. (oms- 113) The object of my invention is to .provide imstop pins 7 aiiixed to vslide bars 3'to limit the proved devices for adjusting rand supporting inward movement of said bars as shown at the leaves Vof refectory tables adapted to .be easily right hand end `of Fig. 1 of the drawing. and quickly operated to .shift to leaves from a I provide metal wear plates v8y `on theunder- 5 concealed position under the table top .to a po- Vside of slide bars .3 as vshow-n in Fig.2.

sition in alinenient with the ksurface `of the table As shown in Figs. a2 and 3 YI provide a metal `top to -functionas `a-n extension of same; to pro- .plate y9 on which is mounted a `gear 10 :adapted vide apparatus adapted to furnish a strong and to mesh in the slots v12 of the slotted bars 11, secure support for the `leaf when .it is adjusted ksaid Vbars L11 being engaged by the .anges .515 of il@ to the .extension position; and to provide novel plate 9.as shown in Figs. .2, `3 `and 4. "Il-ieouter 65 ineane'for permittingof easily and quickly `ad- `ends of .bars 11 arerprovided with tapered vor `justing the leaf vertically to permit the -operaslanting ends 13 which l'exert .a YWedge, action tor to bringthe top surface of the leaf into against the .metal wear platesB ons'lide-bar's l3 to perfect alfinement with the top surface `of the effect vertical adjustment. :of the leaves. -If-prol5 table top. It is also an object .of :my invention vide guide brackets y14 i-nwhichthe ybars llare 70 to provide apparatus .of this character which slidably mounted. I vprovidea spring 16 engagcan be manufactured at moderate cost .and ing 'in .apertures 17in -corresponding ends of which can be readily attached .by manufac-` adjusting Abars f1.1 to exert an outwardtension on turers `of refectory tables to .such tables withsaid bars. I provide a shaft 18 on whichgear 2 9 outV` changing the construction of the tables .ex- 1`O isjmounted and a suitable handle .1.9 for man- 7.5

cept to provide `slots for the slides. ually. operating thisgear and vthereby operating 1t is also an object of my invention 'to prothe bars 11 which in' turn adjust the table leaf vide novel means for automatically illustrating by raising or lower-ing the :slideA YbarsV V3 with the table leaf into -a positionapproximately in which their tapered-endsl engageas shown vin 2@ alineinent with the table top as the leaf is Fig. 2. 80

drawn outwardly to its extended position. I at- The operation of the invention will be readily tain these and other objects of my invention by understood by referring to Figs. 1 and 2 of the the mechanism illustrated in the accompanying drawing. In the right hand end of Fig. l the drawing in Which leaf is shown in its concealed position and in the V3Q Figure 1 is a longitudinal vertical section left hand end of said figure the leaf at the oppothrough a refectory table showing my invention site end of the table top is shown in its extended applied thereto; position aligned with the surface of the table Fig. 2 is a transverse section through the top. To move the leaf from its concealed positable on line 2 2 of Fig. 1; tion, shown in the right hand end of Fig. 1, to

35 Fig. 3 is a vertical section on line 3--3 of Fig. its extended position shown in the left hand end 2, the table top however being omitted; and of Fig. 1, itis only necessary to pull the leaf out Fig. 4 is a horizontal section on line 4--4 of and it automatically moves to the position de- Figg 2, sired. A further slight adjustment of the level Like numerals designate like parts in each of of the leaf may be made if desired by swinging 49 the several views. the handle 9 and thereby actuating gear 10, .95

Referring to the accompanying drawing, there adjusting bars 11 and slide bars 3 which carry w is illustrated a refectory table 1 having end and are ailixed to the leaf and which bars also leaves 2 and the usual bridge bars 5 extending have metal wear plates to be engaged by the transversely of the table top on the under side. tapered ends 13 of the adjusting bars 11 where- 45 I provide wooden slide bars 3 suitably aiiixed by a wedge action is exerted by the longitudinal V190 f to the leaves 2 near their outer ends and having movement of the adjusting bars 11.

tapered blocks 6 glued or otherwise secured to or The slanting or curved surface 4 of blocks 3 formed integral with the slide bars 3. Slots are engage the slotted portion 5a of the bridge bars provided in bridge bars 5 of sufficient size to 5 and thus raise the slide bars 3 and leaves 2,

i5@ receive the major portion of the guide blocks 6 as the leaf is moved from its concealed to its ,195

whereby the leaf will automatically be moved to extended position.

a position in substantial alignment with the sur What I claim iszface of the table top when the leaf and theslide 1. In an apparatus for adjusting and supportbars are moved to their extended position, as ing leaves of refectory tables, theY combination shown at the left hand end of Fig. 1. I provide of a metal plate adapted to be aiixed to the bridge bar extending transversely of a refectory table, said plate having opposite reversely bent side portions to function as guide elements, slotted bars slidable in said guide elements of the plate, a gear mounted on the plate and having its teeth meshing with the slotted portions of the aforesaid bars, a spring extending between and aflixed to the inner ends of the aforesaid bars, the bars having tapered outer ends adapted to exert a wedge action, slide bars adapted to be aixed to an extensible leaf of the refectory table, metal guard plates attached to the bottom of said slide bars in position to be engaged byV the tapered ends of the slotted bars causing a vertical adjustment of the leaf of the table after it has been moved to its lextended position. whereby the leaf may be `easily moved from-a concealed position under the table to an extended position in alignment with the table top.

2. In an apparatus for adjusting and supporting leaves of refectory tables, the combination of a metal plate adapted to be alxed to the bridge bar extending transversely of a refectory table, said plate having opposite reversely bent side portions to function as guide elements, slotted bars, U-shaped in cross section, slidable in said guide elements of the plate, a gear mounted on the plate and having its teeth meshing with the slotted portions of the aforesaid bars, a spring extending between and affixed to the inner ends of the aforesaid bars, the bars having tapered outer ends adapted to exert a wedge action, slide bars adapted to be affixed to an extensible leaf of the refectory table, metal guard plates attached to the bottom of said slide bars in position to be engaged by the tapered ends of the slotted bars causing a vertical adjustment of the leaf of the table after it has been moved to its extended position, whereby the leaf may be easily moved from a concealed position under the table to an extended position in alignment with the table top.

3. In an apparatus for adjusting and supporting leaves of refectory tables, the combination of a metal plate adapted to be affixed to the bridge bar extending transversely of a refectory table, said plate having opposite reversely bent side portions to function as guide elements, slotted bars slidable in said guide elements of the plate, a gear mounted on the plate and having its teeth meshing with the slotted portions of the aforesaid bars, a spring extending between and affixed to the inner ends of the aforesaid bars, the bars having tapered outer ends adapted to exert a wedge action, slide bars `adapted to be afxed to an extensible leaf of the refectory table, metal guard plates attached to the bottom of said slide bars in position to be engaged by the tapered ends of the slotted bars causinga vertical adjustment of the leaf of the table after it has been moved to its extended position, whereby the leaf may be easily moved from a concealed position under the table to an extended position in alignment with the table top, stop pins mounted in the slide bars in position to limit the outward movement of said bars when the leaf reaches a position in which its outer edge is in alignment with the edge of the table top. l

4. As a new article of manufacture a locking mechanism for locking the leaves of tables and the like in a predetermined position, consisting of a metal plate having opposite inturned flanges to function as guide elements, slotted bars slidably mounted in said plate, a gear mounted on said plate and meshing with each of the slotted bars to operate same in a reverse direction when the gear is operated, the bars having tapered ends adapted to function as wedge or locking elements to engage other elements to be locked in a predetermined position.

5. In combination with the device defined in claim 4, a spring extending between and connected to corresponding ends of the respective bars and tending to exert an outward pressure or tension on said bars.

WILLIAM ANDREW DUNCAN. 

